1 // { dg-require-swprintf "" }
2
3 // Copyright (C) 2005-2019 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
19
20 #include <cstdio> // for swprintf
21 #include <iostream>
22 #include <iomanip>
23 #include <sstream>
24 #include <limits>
25 #include <testsuite_hooks.h>
26
27 void
test02()28 test02()
29 {
30 using namespace std;
31
32 // make sure we can output a very long float
33 long double val = numeric_limits<long double>::max();
34 int prec = numeric_limits<long double>::digits10;
35
36 wostringstream os;
37 os.precision(prec);
38 os.setf(wios::scientific);
39 os << val;
40
41 wchar_t largebuf[512];
42 swprintf(largebuf, 512, L"%.*Le", prec, val);
43 #ifdef TEST_NUMPUT_VERBOSE
44 wcout << "expect: " << largebuf << endl;
45 wcout << "result: " << os.str() << endl;
46 #endif
47 VERIFY( os && os.str() == largebuf );
48
49 // Make sure we can output a long float in fixed format
50 // without seg-faulting (libstdc++/4402)
51 double val2 = numeric_limits<double>::max();
52
53 wostringstream os2;
54 os2.precision(3);
55 os2.setf(wios::fixed);
56 os2 << val2;
57
58 swprintf(largebuf, 512, L"%.*f", 3, val2);
59 #ifdef TEST_NUMPUT_VERBOSE
60 wcout << "expect: " << largebuf << endl;
61 wcout << "result: " << os2.str() << endl;
62 #endif
63 VERIFY( os2 && os2.str() == largebuf );
64 }
65
66 int
main()67 main()
68 {
69 test02();
70 return 0;
71 }
72